Door-spring



BQH. CLARK. DOOR SPRING;

Pat; ted Dec. 2, 1884.

(ModeL) Fl 1 I Q 0 .72 8 C Q'E (gfi INVENTOR /la/r/ g BY W ATTORNEYS.

WITNESSES W0 UNTTnn seam PATENT @rrrcno ENOOH HENRY CLARK, OF GREENLAND, NEYV HAMPSHIRE.

' m DOOR-SPRING.

SPECIFICATION forming part of Letters Patent No. 308,749, dated December 2, 1884.

Application filed May 24, 1884. (Modeh) To all whom it may concern.-

Be it known that I, ENooH HENRY CLARK, of Greenland, Rockingham county, and State of New Hampshire, have invented a new and Improved Door-Spring, of which the following is a full, clear, and exact description.

The object of my invention is to provide a simple,'inexpensive, and efficient spring for closing doors.

The invention consists, principally, of a couple 0 t'spring-tongues adapted to be fastened at the hingingedge of the door and in the rabbet of the door-jamb, respectively, the tongues being connected by a'link at their free ends.

The invention consists, also, in particular constructions of parts of the spring and combinations of the parts with each other, and also with the door and its jamb or casing, all as hereinafter fully described and claimed.

Reference is to be had to the accompanying drawings, forming part of this specification, in which similar letters ofreference indicate corresponding parts in both the figures.

Figure 1 is a perspective view from the inner side of portions ofa door and its casing with my improved spring applied, and showing the door open. Fig. 2 is sectional elevation at the opposite side of the door, showing the door closed.

The letter A indicates the door, and a its back or hinging edge.

B is the door jamb or casing, having the usual rabbet in which the door closes, with the edge a of the door facing the side I; of the rabbet of the jamb.

O O are plates let flush into and fastened to the edge a of the door and the side I) of the jamb-rabbet. These plates 0 (3, which are duplicates of each other, have spring-tongues D, formed by slitting or pressing the plates by suitable dies or otherwise. The tongues D, near their outer or free ends, have notches (Z d at each edge, with which notches a link, E, connects to hold the free ends of both tongues to each other.

In forming the tongues D they are pressed so that their free ends shall lie back of the plane of the plates (3, and the edge a of the door and face I) of the jamb are recessed at e to permit the tongues D D and their connecting-link E to enter the recesses when the door is closed, as will be understood from Fig. 2. By pressing the tongues D D back of the face of the plates 0 0 they have a drawing or pulling action on each other, when the door is shut, to hold it firmly closed.

It is evident that when the door is opened the tongues D D will be drawn outward by the link E and put in greater tension, and the tension increasesthcfarther the door is opened, so that on releasing the door the tongues D D will act instantly to close the door; The link E, by its rounded ends, adjusts or accommodates itself in the notches d of the tongues, as they change their positions relatively to each other as the door opens, so that the link has no great tendency to twist or otherwise injure the tongues as they are drawn outward in opening the door.

The tongues D D may be made separately and fixed in any suitable manner to the plates 0 O, or the tongues may directly be fastened without the use of the plates.

A particular advantage of my spring is that when applied it is quite or wholly concealed from view. The action of the spring is positive and efficient, and it may cheaply be made from suitable spring-metal plates by processes not requiring skilled labor, and the spring may readily be applied or removed.

Having thus described my invention, what I Patent, is

1. A door-spring made with two spring tongues secured, respectively, to the hingingedge of the door and in the jamb-rabbet, and linked together at their free ends, substantially as shown and described.

2. Adoor-spring made witha pair ofspringtongues pressed out of face-plates, adapted to be fastened at the edge of the door and in the jambrabbet, and said tongues being linked together at their free ends, substantially as shown and described.

3. In a door-spring, the plate 0, having a at one end to the door and its jamb-rabbet claim as new, and desire to secure by Lettersspring-tongue, D, stamped or pressed from of the ends of the tongues, and a link, E, hav the plate, so as to lie below the plane of the ing rounded ends and adapted to enter the plate, substantially as shown and described. notches, substantially asshown and described. r0

4. The combination, in a door-spring and ENOGH HENRY CLARK. 5 with opposite spring-tongues fastened, re- Witnesses:

spect-ively, in the edge of the door and in the 2 CHARLES FRANCIS RICHARDS,

door-ja-inb rabbet, of notches d in the edges CALVIN PAGE. 

